Were the howitzer, about 100mm brass shell cases from WW1, reused

Passion & Compassion 1914-1918 : WW1 militaria and technical documentation - artillery fuses

Shrapnel shell - Wikipedia

Who invented howitzers? - Quora

Can an artillery shell be reused after being fired? - Quora

Some modern howitzers with caterpillar tracks and turrets look almost like tanks. Are there any hybrids? Has the line become blurred? - Quora

Which wheeled howitzer is most likely to win the US Army's Mobile Howitzer shoot-off competition? - Quora

Were howitzer shells able to be reused or reloaded like ammunition? - Quora

105mm Howitzer Ammunition - Ammunition

Can a Pepsi can be fired from a 200 mm howitzer without any extra protection around the can? - Quora

Artillery Shell Case

Shell International Encyclopedia of the First World War (WW1)

What is the average value of a WWI or WWII artillery shell, and how do I find collectors? - Quora

Did the BL 15-inch Howitzer use powder bags and the shell, like a battleship, or was it propelled in some other way? If so, what was it? - Quora